/*
 * Copyright (c) 2005, 2006, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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 */
package javax.swing.plaf.nimbus;

import java.awt.*;
import java.awt.geom.*;
import java.awt.image.*;
import javax.swing.*;
import javax.swing.Painter;


final class MenuPainter extends AbstractRegionPainter {

  //package private integers representing the available states that
  //this painter will paint. These are used when creating a new instance
  //of MenuPainter to determine which region/state is being painted
  //by that instance.
  static final int BACKGROUND_DISABLED = 1;
  static final int BACKGROUND_ENABLED = 2;
  static final int BACKGROUND_ENABLED_SELECTED = 3;
  static final int ARROWICON_DISABLED = 4;
  static final int ARROWICON_ENABLED = 5;
  static final int ARROWICON_ENABLED_SELECTED = 6;


  private int state; //refers to one of the static final ints above
  private PaintContext ctx;

  //the following 4 variables are reused during the painting code of the layers
  private Path2D path = new Path2D.Float();
  private Rectangle2D rect = new Rectangle2D.Float(0, 0, 0, 0);
  private RoundRectangle2D roundRect = new RoundRectangle2D.Float(0, 0, 0, 0, 0, 0);
  private Ellipse2D ellipse = new Ellipse2D.Float(0, 0, 0, 0);

  //All Colors used for painting are stored here. Ideally, only those colors being used
  //by a particular instance of MenuPainter would be created. For the moment at least,
  //however, all are created for each instance.
  private Color color1 = decodeColor("nimbusSelection", 0.0f, 0.0f, 0.0f, 0);
  private Color color2 = decodeColor("nimbusBlueGrey", 0.0f, -0.08983666f, -0.17647058f, 0);
  private Color color3 = decodeColor("nimbusBlueGrey", 0.055555582f, -0.09663743f, -0.4627451f, 0);
  private Color color4 = new Color(255, 255, 255, 255);


  //Array of current component colors, updated in each paint call
  private Object[] componentColors;

  public MenuPainter(PaintContext ctx, int state) {
    super();
    this.state = state;
    this.ctx = ctx;
  }

  @Override
  protected void doPaint(Graphics2D g, JComponent c, int width, int height,
      Object[] extendedCacheKeys) {
    //populate componentColors array with colors calculated in getExtendedCacheKeys call
    componentColors = extendedCacheKeys;
    //generate this entire method. Each state/bg/fg/border combo that has
    //been painted gets its own KEY and paint method.
    switch (state) {
      case BACKGROUND_ENABLED_SELECTED:
        paintBackgroundEnabledAndSelected(g);
        break;
      case ARROWICON_DISABLED:
        paintarrowIconDisabled(g);
        break;
      case ARROWICON_ENABLED:
        paintarrowIconEnabled(g);
        break;
      case ARROWICON_ENABLED_SELECTED:
        paintarrowIconEnabledAndSelected(g);
        break;

    }
  }


  @Override
  protected final PaintContext getPaintContext() {
    return ctx;
  }

  private void paintBackgroundEnabledAndSelected(Graphics2D g) {
    rect = decodeRect1();
    g.setPaint(color1);
    g.fill(rect);

  }

  private void paintarrowIconDisabled(Graphics2D g) {
    path = decodePath1();
    g.setPaint(color2);
    g.fill(path);

  }

  private void paintarrowIconEnabled(Graphics2D g) {
    path = decodePath1();
    g.setPaint(color3);
    g.fill(path);

  }

  private void paintarrowIconEnabledAndSelected(Graphics2D g) {
    path = decodePath2();
    g.setPaint(color4);
    g.fill(path);

  }


  private Rectangle2D decodeRect1() {
    rect.setRect(decodeX(1.0f), //x
        decodeY(1.0f), //y
        decodeX(2.0f) - decodeX(1.0f), //width
        decodeY(2.0f) - decodeY(1.0f)); //height
    return rect;
  }

  private Path2D decodePath1() {
    path.reset();
    path.moveTo(decodeX(0.0f), decodeY(0.2f));
    path.lineTo(decodeX(2.7512195f), decodeY(2.102439f));
    path.lineTo(decodeX(0.0f), decodeY(3.0f));
    path.lineTo(decodeX(0.0f), decodeY(0.2f));
    path.closePath();
    return path;
  }

  private Path2D decodePath2() {
    path.reset();
    path.moveTo(decodeX(0.0f), decodeY(1.0f));
    path.lineTo(decodeX(1.9529617f), decodeY(1.5625f));
    path.lineTo(decodeX(0.0f), decodeY(3.0f));
    path.lineTo(decodeX(0.0f), decodeY(1.0f));
    path.closePath();
    return path;
  }


}
